Automatic stopping attachment for phonographs



B. W. GARDNER AUTOMATIC STOPPING ATTACHMENT FOR PHONOGRAPHS Feb. 27,1923.

Filed June 13, 1920 2 sheets-sheet 1 Feb. 27, 1923.

B. W. GARDNER AUTOMATIC STOPPING ATTACHMENT FbR PHONOGRAPHS 2 sheebs sheet 2 Filed June 18, 1920 lNVENTOR Patented Feb. 27, 1923.,

auiiirt amiss BLAKE WILLIAM GAEDNEJR, EM s ammanauro lre'rrc STQPPIIQIG nr racnrrnnrr ron rnonoenerns.

epn iea en fil 3 4mm To all whom-it may concern:

Be it known that I, BLAKE WILLIAM GARDNER, a citizen of the United smies,"residing at lvleniphis, in the county of Shelby and the State of Tennessee, have invented a new Automatic Stopping Attachment for Phonographsl My invention relates to stopping devices for phonographs or talking machines and has for an object to provide an improved constructionand arrangement of elements which used in conjunction with two moving parts of a phonograph; will effect automatic stopping or the machine when the stylus, carried by the tone arin reaches the end of record groove, and itself stops m es i Another object is to provide accuracy in operation, simplicity in construction and to reduce to a minimum the resistance or impelling pressure on the tone arm through operation of the attachments.

Another object is to produce a stopping device which requires no'skill or knowledge ofthe workingpartsto'enableany one to set the mechanisr'n' and which requires neatt ention when onceput into action.

I attain these and other objects by the mechanism illustrated the accompanying drawing which shows a practical'embodimerit of my invention, and in which Figure l is atop plan view of the device showing the necessary coacting parts 'in their relative positions while the recorduis being played.

" Figiire 2' is a side elevation showln'g the parts that are closely-associated withzthe tone arm;

inpl'an; the-escapement and its trippingde. vice. v I i Figure 4k is a fragmentary view in plan and enlarged showing the tone+arm properly locatedand relative position of'ithe pin-39 and theturntablefi 1 r v In -the drawings-,1represents the lower member of a-two part frictionrjointed lever liavinga slot-2 'for connection to a tonearm 38by-means of pin 7 g lower portionof said lever conta ns a stationary disk '3 and pin' '5 with a disked; washer beneath the pin .to produce slight frictionatthe joint. 'Thecnt away portion l on disk isdesigned to operate a tensi n lever 7 which carries the plate spring 9, the free end of said spring 9 acting torepel Figures?) is a fragmentary view showing.

39 (see 2). The

1 920. Serial n. 339,395.

alternating or vibrating lever 10 at all times except while the tone arm 'is travelling within 3. inches from the center of the record. Therefore no stopping of phonograph cantake place unless the tone arm, or rather, the stylus pin is within inches from the center of the disk record. At this point tension lever 7 will enter cut out 4' in disk 3 and release pressure by spring 9 against lever 10 and allows lever 10' to remain under control of repelling bar 40, Repelling bar 40 is rigidly attached to lever 8. The upper member 8 of jointed lever is pivoted'and bridged at its extreme end by bridge 11. d2

is a guide bridge which retains lever .8

position but affording a slight swinging movement to insure correct action against lever, 10 by bar 40 this action is-secured by means of pivoting lever Sat its extreme upper end to'the bridge 11, and the correctaction upon friction joint is secured, which is free from any recoil; I V V i V Alternating or oscillating lever 10 is pivoted at'its lower end into oneend of a rocking brake lever 24, and is held to correctposition by a guide 12 containing a slot which permits the lever :10f'to' oscillate or vibrate above escapement wheels 13 and 14:, but not in contact with sa-id-wheels, except through cam 19 or trip pin 20. When vSaid lever 10 is repelled or forced outwardly action of the 'pin 20 on the rotating escape-1 ment wheel 14 itztilts or rockslevei'24 which pushes up lever-2,6, this lever having a lug 27 on its underside WhlChaStlflkQS the brake lever latch 22', releasing the tail piece inactive.

Level 2 which 7 is lifting l ver H -lee 1S p edas stated, W th else 2 Which plate 35.

" The n y se w ee seb ve lie bas Pie-F tr p "wheel Which hens t9 t onithe bra-ke arm 31, whic t e spring129-.. rotating the lGYBIQV-p Q 'QQ h brak $1 0.61??

vengages ve '22 an m ssin area a guide 28 ncoding pwardlyiremithebew right, and the cam wheel 13 which turns-to the l f these W ee s meshing, andcdiistiti wi h th ibrating le er ne ins oo i i-th t ip in rm B ar seem 119' the escapeuient device. 4 v i The driving mechanism for the device includes four gears only and the two escapement wheels, the gear wheel 18 which fits over the center post of the phonograph has 25 teeth and meshes with gear 17 having 50 teeth; on the same shaft or arbor with gear 17 is the gear 16 having 18 teeth and meshing with gear wheel 15. On the shaft of gear 15 is the smaller escapement gear wheel 14 which as stated be fore meshes with gear 13 carrying the cam 19. Thus the gear wheel over post of the phonograph with two other wheels and the pinions 15, 16 and 17 complete the gear into an escapement gear causing one turn of the escape wheels to three revolutions of the center post.

The operation of the control lever and its particular design are very important, as it will be noted that it is free only to pivot at its extreme end. lVit-h the tone arm pin 39 operating in slot 2 and repelling bar 10 at center of lever, said control lever forms a levera 'e at bar tO and thus Wlll be secured I v 7 I twice the resistanceior repelling lever 10 through to that would be applied against tone arm 1n carrylng upthe lever 1.

When the tension lever 7 and sprin g 9 are in the position shown in Fig. l, the tone arm is at outer side of the record and tension lever 7 is forced to outer rim of the disc 8, applying spring 9 against lever 10 and holding it out of tripping position at all times, except, when released by means of cut out ion disk 8, which the tension lever 7 enters while the stylus is about three and one half inches from center of record, or beyond the point where the farthermost record grooves end, and the lever 10 should be over at the right'of the slot in guide 12 and free from the action of the tripping pin 20.

In Figure 3 is shown the cam 19 repelling lever 10 into tripping position with tripping pin 20, escaping beneath'the hook provided on lever 10. If now at this point the tone arm has reached the innermost c rcle where said arm'stop s, travelling toward the center post, level-V10 will remain in the position "placed by the cam, and tripping pin 20 will enter the hook and repel or force lever 10 outwardly rocking lever 24:, lifting brake restraining lever'22 and releasing the tail 'piece 30; the spring 29 then acts to swing the brake arm on the-fulcrum and forcing the brake shoe 32 against the turn table,

cause the phonograph to stop.

If the stylus has not reached the innermost'circle, then lever 10 will move to the right and .pin' 20 will escape the hook, as in Fig. 3. V When the lever10 is repelled or forced outwardly by the action of trip pin 20 in releasing the brake, spring 25' will repel all the levers'to their setting position against bumper 41.

the operation ofthis device are required.

The brake lever is released by the gears con nected up with the center postof the machine, while the vibratory end of lever 10 extending into the escape gears is controlled and held out of actuating posit-ion by the slotted lever section 1, which is connected with the tone arm 38 through the pin 39 and said section is carried up by the pin as the record is being played, causing a steady pressure through the repelling bar at the joint of the lever sections against'the tripping oscillating lever 10, consequently the tone arm must stop travelling toward the center before a cut off or stopping of the machine can be effected.

So long as the tone arm travels toward center of the record, repelling bar 40 continually causes the lever or trip bar 10 to arm stops, the cam 19 then comes into engagement with the trip bar 10 and holds it in position during one complete revolution of the recor r F or lack of space the lower portion of control lever is shown slanting to the right, but it should have about an equal slant to the left when connected with thetone arm.

Having thus fully described my invention and the means by which it is to be car'- ried into effect, what I claim is: V 7

1. In a talking machine, aturn table, a tone arm, a sectional control lever: coacting with said tone arm, a stop on said control lever, a tension lever 'fulcrumed on the one section of said control lever, means for moving the other section of said control lever in one direction during and with the move ment of the tone arm toward the center of the turn table, a spring actuated brake lever carrying a brake shoe adapted for engage ment with said turn table, a tripping lever,

drivenfrom the spindle of said turn table,

and adapted to coact with said trip lever when the movement ofthe tone arm ceases, and an intermediate and interconnected system of levers-interposed between said tripping lever and' the brake lever whereby to release the brake and apply the same to the turn table upon stoppage of movement of the tone arm toward the center of the same.

2.- In an automatic stopfor phonographs, the combination of a brake, asp ring tending to apply the brake, a detent for; holding.

the brake in off position, a reciprocatory brake releasing rod movable longitudinally into and out of position to engage and to release said detent from the brake lever, a

tripping escapement gear driven by ithespindle of the turntableof the n'iachine, ;a trip lever adapted to be actuated by said escapement, and means actuated by the tone arm and tending when the stylus is traversing a record to shift said trip lever out of 'operative position, said means including a sectional control lever and an impelling bar carried and actuated thereby and adapted to engage said trip lever.

3. In an automatic stop for phonographs, the combination of a brake, a spring tending normally to apply said brake, a detent for holding said brake in inoperative position, a sectional control lever, the sections connected at opposite ends by a friction joint, the one section pivotally anchored at one end, a tension lever pivotally secured to said section adjacent the said joint, the other section provided with a longitudinal guidevvay, a stop carried by the guidevvay section at said joint and adapted to control said tension lever, a tone arm, a pin projecting "from said tone arm and adapted for engagement with said guideway, an escapement geared with the spindle of the turn table of the phonograph, a trip lever engageable by said escapement, an impelling bar carried by the first named section of the control lever, and levers interconnected with said trip lever and the brake detent, the stoppage of movement of the tone arm toward the center of the record causing the tension lever to permit the trip lever to be moved into the path of movement of the escapement and be impelled by said escapement to release said detent and apply the brake.

at. In an automatic stop for phonographs, the-combination of a brake, a spring tending to apply the brake, a detent for holding the brake in off position, a reciprocating brake releasing rod movable longitudinally into and out of positionto engage and release detent, an escapement train driven from the V spindle of the turntable of the machine,a vibratory trip lever adapted to be tripped by said escape, and means actuated by the tone arm, to cause the trip lever to move to tripping position, said means including a sectional control lever, a tension lever carried by one section thereof, and contacting with said trip lever and an impelling bar carried by the control lever.

5. In an automatic stop for phonographs,

a turn table, a tone arm,'a control lever 00- trip lever, to release said latch and apply the v brake to the turn table, said means comprising an intermediate and interconnected syste'm of levers interposed between the trip lever and brake lever.

6. In atalking machine including a turn-- table, and a tone arm, a jointed control lever coactingtvith the tone arm, an escapement driven from the spindle of the turn table, a spring actuated brake, a latch for holding said brake in off position, a vibra tory and longitudinally movable trip lever, said lever being straight and pivoted at one end and having a trigger at its other end, a rocking "lever pivotally connected to said straight lever paralleling said control lever and mediating escapement, and means for causing the escapement to actuate the trip lever, in its longitudinal direction and through the rocking lever to release the aforesaid latch.

BLAKE WILLIAM GARDNER 

